| Date Filed | Type | Description |
| 04/30/2019 |
10-K/A
| Annual Report for the period ended December 31, 2018 [amend] |
| 03/13/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 03/26/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/31/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 07/11/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 03/25/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 06/17/2015 |
10-K/A
| Annual Report for the period ended December 31, 2014 [amend] |
| 04/15/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 04/30/2014 |
10-K/A
| Annual Report for the period ended December 31, 2013 [amend] |
| 03/31/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 04/30/2013 |
10-K/A
| Annual Report for the period ended December 31, 2012 [amend] |
| 04/01/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/07/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 11/14/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 03/28/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/22/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/31/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/31/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 11/13/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/27/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/20/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/31/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/04/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 04/17/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 03/31/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/26/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/30/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 04/14/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 04/14/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/31/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 04/01/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |